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Copy a stream to avoid “stream has already been operated upon or closed”
...call to Supplier.get(). i.e if a database query... that query is done each time
– Julien
May 4 at 10:13
...
Average of 3 long integers
...ker's delight is even more correct but I'll the implementation for another time
– phuclv
May 30 '14 at 16:10
I'm not s...
Swift native base class or NSObject
...objc_msgSend() for calls to (most of) their methods
provide Objective-C runtime metadata for (most of) their method implementations
Swift classes that are not subclasses of NSObject:
are Objective-C classes, but implement only a handful of methods for NSObject compatibility
do not use objc_msgSe...
Read specific columns from a csv file with csv module?
...content
Now that we have covered your mistake, I would like to take this time to introduce you to the pandas module.
Pandas is spectacular for dealing with csv files, and the following code would be all you need to read a csv and save an entire column into a variable:
import pandas as pd
df = pd...
Compare two DataFrames and output their differences side-by-side
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This implementation is taking a longer time when comparing dataframes with 26K rows and 400 columns. Is there any way to speed it up?
– codeslord
Jul 18 '18 at 5:03
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What happens when a computer program runs?
...irectly). It is commonly used for data structures that you allocate at runtime (in C++, using new and delete, and malloc and friends in C, etc).
The stack and heap, on the x86 architecture, both physically reside in your system memory (RAM), and are mapped through virtual memory allocation into th...
Why exactly is eval evil?
...ons are evaluated and one can also evaluate the function part. Most of the time the use of EVAL shows a lack of understanding of the evaluator.
It is the same problem with macros. Often beginners write macros, where they should write functions - not understanding what macros are really for and not u...
C# using streams
...elp explain a lot of the example code you'll see dotted about, most of the time you don't read and write to a stream directly. Streams are a low-level means to transfer data.
You'll notice that the functions for reading and writing are all byte orientated, e.g. WriteByte(). There are no functions f...
Play audio with Python
...For me, this was not working. I mean, it was playing but no sound. I added time.sleep(5) at the end and that worked. Python 3.6 on Windows 8.1
– Nagabhushan S N
Nov 22 '18 at 6:15
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Difference between an API and SDK
...ier to visually understand hardware analogy
– Sliceoftime
May 7 '09 at 14:50
17
Continuing this g...